pm24.git/drivers/cpufreq/Kconfig, branch master

cpufreq: add virtual-cpufreq driver

2024-10-29T06:35:14Z

Introduce a virtualized cpufreq driver for guest kernels to improve performance and power of workloads within VMs. This driver does two main things: 1. Sends the frequency of vCPUs as a hint to the host. The host uses the hint to schedule the vCPU threads and decide physical CPU frequency. 2. If a VM does not support a virtualized FIE(like AMUs), it queries the host CPU frequency by reading a MMIO region of a virtual cpufreq device to update the guest's frequency scaling factor periodically. This enables accurate Per-Entity Load Tracking for tasks running in the guest. Co-developed-by: Saravana Kannan Signed-off-by: Saravana Kannan Signed-off-by: David Dai Signed-off-by: Viresh Kumar

cpufreq: Drop CONFIG_ARM and CONFIG_ARM64 dependency on Arm drivers

2024-09-04T15:13:58Z

The CONFIG_ARM and CONFIG_ARM64 dependency is redundant as all the drivers have necessary sub-arch dependency and don't depend on the architecture support. Signed-off-by: Rob Herring (Arm) Signed-off-by: Viresh Kumar

cpufreq: Add Loongson-3 CPUFreq driver support

2024-07-09T03:15:43Z

Some of LoongArch processors (Loongson-3 series) support DVFS, their IOCSR.FEATURES has IOCSRF_FREQSCALE set. And they has a micro-core in the package called SMC (System Management Controller), which can be used to detect temperature, control fans, scale frequency and voltage, etc. The Loongson-3 CPUFreq driver is very simple now, it communicate with SMC, get DVFS info, set target frequency from CPUFreq core, and so on. There is a command list to interact with SMC, widely-used commands in the CPUFreq driver include: CMD_GET_VERSION: Get SMC firmware version. CMD_GET_FEATURE: Get enabled SMC features. CMD_SET_FEATURE: Enable SMC features, such as basic DVFS, BOOST. CMD_GET_FREQ_LEVEL_NUM: Get the number of all frequency levels. CMD_GET_FREQ_BOOST_LEVEL: Get the first boost frequency level. CMD_GET_FREQ_LEVEL_INFO: Get the detail info of a frequency level. CMD_GET_FREQ_INFO: Get the current frequency. CMD_SET_FREQ_INFO: Set the target frequency. In future we will add automatic frequency scaling, which is similar to Intel's HWP (HardWare P-State). Signed-off-by: Binbin Zhou Signed-off-by: Huacai Chen [ Viresh: Minor formatting cleanups, change return type of exit() to void and use devm_mutex_init() ] Signed-off-by: Viresh Kumar

cpufreq: Move CPPC configs to common Kconfig and add RISC-V

2024-03-20T01:30:55Z

CPPC related config options are currently defined only in ARM specific file. However, they are required for RISC-V as well. Instead of creating a new Kconfig.riscv file and duplicating them, move them to the common Kconfig file and enable RISC-V too. Signed-off-by: Sunil V L Acked-by: Viresh Kumar Reviewed-by: Pierre Gondois Acked-by: Rafael J. Wysocki Acked-by: Sudeep Holla Link: https://lore.kernel.org/r/20240208034414.22579-3-sunilvl@ventanamicro.com Signed-off-by: Palmer Dabbelt

arch: Remove Itanium (IA-64) architecture

2023-09-11T08:13:17Z

The Itanium architecture is obsolete, and an informal survey [0] reveals that any residual use of Itanium hardware in production is mostly HP-UX or OpenVMS based. The use of Linux on Itanium appears to be limited to enthusiasts that occasionally boot a fresh Linux kernel to see whether things are still working as intended, and perhaps to churn out some distro packages that are rarely used in practice. None of the original companies behind Itanium still produce or support any hardware or software for the architecture, and it is listed as 'Orphaned' in the MAINTAINERS file, as apparently, none of the engineers that contributed on behalf of those companies (nor anyone else, for that matter) have been willing to support or maintain the architecture upstream or even be responsible for applying the odd fix. The Intel firmware team removed all IA-64 support from the Tianocore/EDK2 reference implementation of EFI in 2018. (Itanium is the original architecture for which EFI was developed, and the way Linux supports it deviates significantly from other architectures.) Some distros, such as Debian and Gentoo, still maintain [unofficial] ia64 ports, but many have dropped support years ago. While the argument is being made [1] that there is a 'for the common good' angle to being able to build and run existing projects such as the Grid Community Toolkit [2] on Itanium for interoperability testing, the fact remains that none of those projects are known to be deployed on Linux/ia64, and very few people actually have access to such a system in the first place. Even if there were ways imaginable in which Linux/ia64 could be put to good use today, what matters is whether anyone is actually doing that, and this does not appear to be the case. There are no emulators widely available, and so boot testing Itanium is generally infeasible for ordinary contributors. GCC still supports IA-64 but its compile farm [3] no longer has any IA-64 machines. GLIBC would like to get rid of IA-64 [4] too because it would permit some overdue code cleanups. In summary, the benefits to the ecosystem of having IA-64 be part of it are mostly theoretical, whereas the maintenance overhead of keeping it supported is real. So let's rip off the band aid, and remove the IA-64 arch code entirely. This follows the timeline proposed by the Debian/ia64 maintainer [5], which removes support in a controlled manner, leaving IA-64 in a known good state in the most recent LTS release. Other projects will follow once the kernel support is removed. [0] https://lore.kernel.org/all/CAMj1kXFCMh_578jniKpUtx_j8ByHnt=s7S+yQ+vGbKt9ud7+kQ@mail.gmail.com/ [1] https://lore.kernel.org/all/0075883c-7c51-00f5-2c2d-5119c1820410@web.de/ [2] https://gridcf.org/gct-docs/latest/index.html [3] https://cfarm.tetaneutral.net/machines/list/ [4] https://lore.kernel.org/all/87bkiilpc4.fsf@mid.deneb.enyo.de/ [5] https://lore.kernel.org/all/ff58a3e76e5102c94bb5946d99187b358def688a.camel@physik.fu-berlin.de/ Acked-by: Tony Luck Signed-off-by: Ard Biesheuvel

cpufreq: Make CONFIG_CPUFREQ_DT_PLATDEV depend on OF

2023-06-30T07:43:43Z

The cpufreq-dt-platform.c driver requires CONFIG_OF to be selected. Mark it as a dependency. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202306250025.savpMM8L-lkp@intel.com/ Signed-off-by: Viresh Kumar Signed-off-by: Rafael J. Wysocki

Merge tag 'cpufreq-arm-updates-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

2023-06-27T18:10:57Z

Pull ARM cpufreq updates for 6.5 from Viresh Kumar: "- Add support to build cpufreq-dt-platdev as module (Zhipeng Wang). - Don't allocate Sparc's cpufreq_driver dynamically (Viresh Kumar). - Add support for TI's AM62A7 platform (Vibhore Vardhan). - Add support for Armada's ap807 platform (Russell King (Oracle)). - Add support for StarFive JH7110 SoC (Mason Huo). - Fix voltage selection for Mediatek Socs (Daniel Golle). - Fix error handling in Tegra's cpufreq driver (Christophe JAILLET). - Document Qualcomm's IPQ8074 in DT bindings (Robert Marko). - Don't warn for disabling a non-existing frequency for imx6q cpufreq driver (Christoph Niedermaier). - Use dev_err_probe() in Qualcomm's cpufreq driver (Andrew Halaney)."

cpufreq: amd-pstate: Set default governor to schedutil

2023-06-20T10:18:08Z

The Kconfig currently defaults the governor to schedutil on x86_64 only when intel-pstate and SMP have been selected. If the kernel is built only with amd-pstate, the default governor should also be schedutil. Signed-off-by: Mario Limonciello Reviewed-by: Leo Li Acked-by: Huang Rui Tested-by: Perry Yuan Acked-by: Viresh Kumar Signed-off-by: Rafael J. Wysocki

cpufreq: dt-platdev: Support building as module

2023-06-05T11:03:05Z

Make the cpufreq platdev driver as tristate so that it can be built as loadable module. Also add MODULE_LICENSE to support building as module. Signed-off-by: Zhipeng Wang [ Viresh: Merged two commits, included module.h ] Signed-off-by: Viresh Kumar

Merge tag 'pm-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2023-02-21T20:13:58Z

Pull power management updates from Rafael Wysocki: "These add EPP support to the AMD P-state cpufreq driver, add support for new platforms to the Intel RAPL power capping driver, intel_idle and the Qualcomm cpufreq driver, enable thermal cooling for Tegra194, drop the custom cpufreq driver for loongson1 that is not necessary any more (and the corresponding cpufreq platform device), fix assorted issues and clean up code. Specifics: - Add EPP support to the AMD P-state cpufreq driver (Perry Yuan, Wyes Karny, Arnd Bergmann, Bagas Sanjaya) - Drop the custom cpufreq driver for loongson1 that is not necessary any more and the corresponding cpufreq platform device (Keguang Zhang) - Remove "select SRCU" from system sleep, cpufreq and OPP Kconfig entries (Paul E. McKenney) - Enable thermal cooling for Tegra194 (Yi-Wei Wang) - Register module device table and add missing compatibles for cpufreq-qcom-hw (Nícolas F. R. A. Prado, Abel Vesa and Luca Weiss) - Various dt binding updates for qcom-cpufreq-nvmem and opp-v2-kryo-cpu (Christian Marangi) - Make kobj_type structure in the cpufreq core constant (Thomas Weißschuh) - Make cpufreq_unregister_driver() return void (Uwe Kleine-König) - Make the TEO cpuidle governor check CPU utilization in order to refine idle state selection (Kajetan Puchalski) - Make Kconfig select the haltpoll cpuidle governor when the haltpoll cpuidle driver is selected and replace a default_idle() call in that driver with arch_cpu_idle() to allow MWAIT to be used (Li RongQing) - Add Emerald Rapids Xeon support to the intel_idle driver (Artem Bityutskiy) - Add ARCH_SUSPEND_POSSIBLE dependencies for ARMv4 cpuidle drivers to avoid randconfig build failures (Arnd Bergmann) - Make kobj_type structures used in the cpuidle sysfs interface constant (Thomas Weißschuh) - Make the cpuidle driver registration code update microsecond values of idle state parameters in accordance with their nanosecond values if they are provided (Rafael Wysocki) - Make the PSCI cpuidle driver prevent topology CPUs from being suspended on PREEMPT_RT (Krzysztof Kozlowski) - Document that pm_runtime_force_suspend() cannot be used with DPM_FLAG_SMART_SUSPEND (Richard Fitzgerald) - Add EXPORT macros for exporting PM functions from drivers (Richard Fitzgerald) - Remove /** from non-kernel-doc comments in hibernation code (Randy Dunlap) - Fix possible name leak in powercap_register_zone() (Yang Yingliang) - Add Meteor Lake and Emerald Rapids support to the intel_rapl power capping driver (Zhang Rui) - Modify the idle_inject power capping facility to support 100% idle injection (Srinivas Pandruvada) - Fix large time windows handling in the intel_rapl power capping driver (Zhang Rui) - Fix memory leaks with using debugfs_lookup() in the generic PM domains and Energy Model code (Greg Kroah-Hartman) - Add missing 'cache-unified' property in the example for kryo OPP bindings (Rob Herring) - Fix error checking in opp_migrate_dentry() (Qi Zheng) - Let qcom,opp-fuse-level be a 2-long array for qcom SoCs (Konrad Dybcio) - Modify some power management utilities to use the canonical ftrace path (Ross Zwisler) - Correct spelling problems for Documentation/power/ as reported by codespell (Randy Dunlap)" * tag 'pm-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (53 commits) Documentation: amd-pstate: disambiguate user space sections cpufreq: amd-pstate: Fix invalid write to MSR_AMD_CPPC_REQ dt-bindings: opp: opp-v2-kryo-cpu: enlarge opp-supported-hw maximum dt-bindings: cpufreq: qcom-cpufreq-nvmem: make cpr bindings optional dt-bindings: cpufreq: qcom-cpufreq-nvmem: specify supported opp tables PM: Add EXPORT macros for exporting PM functions cpuidle: psci: Do not suspend topology CPUs on PREEMPT_RT MIPS: loongson32: Drop obsolete cpufreq platform device powercap: intel_rapl: Fix handling for large time window cpuidle: driver: Update microsecond values of state parameters as needed cpuidle: sysfs: make kobj_type structures constant cpuidle: add ARCH_SUSPEND_POSSIBLE dependencies PM: EM: fix memory leak with using debugfs_lookup() PM: domains: fix memory leak with using debugfs_lookup() cpufreq: Make kobj_type structure constant cpufreq: davinci: Fix clk use after free cpufreq: amd-pstate: avoid uninitialized variable use cpufreq: Make cpufreq_unregister_driver() return void OPP: fix error checking in opp_migrate_dentry() dt-bindings: cpufreq: cpufreq-qcom-hw: Add SM8550 compatible ...